isDataType

Indicates if this Type specifies DataTypes (true) or DataObjects (false).
When false, any object that is an instance of this type
also implements the DataObject interface.
True for simple types such as Strings and numbers.
For any object:

isOpen

Indicates if this Type allows any form of open content. If false,
dataObject.getInstanceProperties() must be the same as
dataObject.getType().getProperties() for any DataObject dataObject of this Type.

isSequenced

Indicates if this Type specifies Sequenced DataObjects.
Sequenced DataObjects are used when the order of values
between Properties must be preserved.
When true, a DataObject will return a Sequence. For example,

getInstanceProperties

Returns a read-only List of instance Properties available on this Type.

This list includes, at a minimum, any open content properties (extensions) added to
the object before defining
the Type's Type. Implementations may, but are not required to in the 2.1 version
of SDO, provide additional instance properties.